Mat Zemlya

Mat Zemlya is an East Slavic personification of earth acting as a deity. She is also called Mati Syra Zemlya meaning Mother Damp Earth or Mother Moist Earth.

Mythology

Old Slavic beliefs seem to attest some awareness of an ambivalent nature of the Earth: it was considered men's cradle and nurturer during one's lifetime, and, when the time of death came, it would open up to receive their bones, as if it were a "return to the womb".
The imagery of the "moist earth" also appears in funeral lamentations either as a geographical feature or invoked as "Mother Moist Earth".
The Slavic epic bogatyr Mikula Selyaninovich, or Mikula the Villager, has his power from Mat Zemlya.